After all parts have been collected, the weapon can be built at any of the buildable tables around the map. When picked up, it can have either one of four names: Mar-Astagua (Shadow-Servant), Nar-Ullaqua (Teeth-Consume), Kor-Maroth (Eclipse-Shadow), and Lor-Zarozzor (Flow/Radiate-Decay).

Similarly to the Sliquifier and the KT-4, after being picked up, it is no longer available on the table it was built on, but if it is lost, it will be again available through the Mystery Box.

The Apothicon Servant cannot be Pack-a-Punched, and was supposed to have a specific upgrade method. It was discovered that the trigger for a step to upgrade it had been removed from the code[1]. When obtained through the /give command on PC, the upgraded variant has Arbgwaoth (Powerup) appended to its name, ammunition increased to 1+13 (was 1+24 before a patch in September 2016[2]) and it fires dark red portals which last longer and suck zombies faster. It does not have a specific texture.

In Revelations, the Apothicon Servant can be obtained from the Mystery Box. Unlike Shadows of Evil, the Apothicon Servant has only one name, Estulla Astoth (Envy All).

The weapon is able to be upgraded by shooting it at 5 blue objects floating above some teleporters and jump pads. After this has been completed, it can be placed in the Pack-a-Punch Machine. The upgraded version is called Estoom-oth ("Estoom" means "sin/suffering" in Apothicon) and has a randomly colored camouflage texture similar to other upgraded weapons. It functions the same as the "Arbgwaoth" version in Shadows of Evil.